arcrenew: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/arcrenew - from package: nordugrid-arc-client

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/arcrenew - from package: nordugrid-arc-client

You may install the required package with command apt-get install {package}

Error in other languages:
arcrenew: bevel nie gevind nie
arcrenew: comandă negăsită
arcrenew: comando não encontrado
arcrenew: commande introuvable
arcrenew: command not found
arcrenew: käsku ei ole
arcrenew: không tìm thấy lệnh
arcrenew: komanda nerasta
arcrenew: Kommando nicht gefunden.
arcrenew: kommandot finns inte
arcrenew: komut yok
arcrenew: nie znaleziono polecenia
arcrenew: níor aimsíodh an t-ordú
arcrenew: no se encontró la orden
arcrenew: no s'ha trobat l'ordre
arcrenew: opdracht niet gevonden
arcrenew: parancs nem található
arcrenew: perintah tidak ditemukan
arcrenew: príkaz nenájdený
arcrenew: příkaz nenalezen
arcrenew: команда не найдена
arcrenew: командата не е открита
arcrenew: 命令找不到
arcrenew: コマンドが見つかりません